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LG KD3500 Service Manual page 49

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Checking Flow : Back Light
START
No
Check the U303 pin 5
Check & replace QSC
+VPWR
Yes
No
Is U303 pin3 bigger then 5V?
Change U303
Yes
No
Check the signal level at
Replace QSC
LCD_BACK_EN=high?
Yes

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Rd3500

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